A person has died at a gym on the ground floor of 25 Canada Square in Canary WharfGetty

A man has died of a heart attack at a gym on the ground floor of the Citi Bank building in Canary Wharf. Paramedics rushed to Nuffield Health at 33 Canada Square, in the heart of London's financial district, shortly after 1pm on Wednesday (24 February), but the man was pronounced dead at the scene.

The gym was closed for the day and members were sent an email that read: "Due to an incident gym facilities will be closed today. Apologies for any inconvenience caused."

A London Ambulance spokesperson said: "We were called at 1.23pm today to reports of a person collapsed at Canada Square in E14. We sent a single responder by car, an ambulance crew and an advanced paramedic to the scene. We treated a man in cardiac arrest. Sadly, despite extensive efforts to resuscitate the patient, he died at the scene."

A Nuffield Health spokesperson said: "We are aware of an incident that took place earlier on today at our gym in Citibank and at this moment in time we cannot comment any further."

The gym is for corporate customers who work for tenants in the skyscraper and opens from 6am until 9pm. It boasts cardiovascular equipment, a free weights area and two rooms for fitness classes. As well as Citi Bank, tenants include Crossrail, HSBC, Lehman Brothers and IBTimes UK.